Display device

Patent metadata

Field	Value
Publication number	US-2021020725-A1
Application number	US-202016886075-A
Country	US
Kind code	A1
Filing date	May 28, 2020
Priority date	Jul 16, 2019
Publication date	Jan 21, 2021
Grant date	—

Abstract

A display device including a substrate including a display area and an opening area therein, a data conductive layer on the substrate and including a source electrode and a voltage wiring in the opening area, a protective layer on the data conductive layer and covering the source electrode and the voltage wiring, a pixel electrode layer including a pixel electrode connected to the source electrode through a first contact hole, and an electrode pattern connected to the voltage wiring through a second contact hole, a pixel defining layer including an opening exposing the pixel electrode and a hole exposing the electrode pattern, a light emitting layer on the pixel defining layer and a common electrode on the light emitting layer, wherein the hole does not overlap the first and second contact holes.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate comprising a display area and an opening area located in the display area; a data conductive layer disposed on the substrate, the data conductive layer comprising a source electrode disposed in the display area and a voltage wiring disposed in the opening area; a protective layer disposed on the data conductive layer, the protective layer covering the source electrode and the voltage wiring; a planarization layer disposed on the protective layer; a pixel electrode layer disposed on the planarization layer, the pixel electrode layer comprising:
a pixel electrode connected to the source electrode through a first contact hole penetrating the planarization layer and the protective layer; and
an electrode pattern connected to the voltage wiring through a second contact hole penetrating the planarization layer and the protective layer;
a pixel defining layer disposed on the planarization layer and the pixel electrode layer, the pixel defining layer comprising:
an opening exposing a portion of the pixel electrode; and
a hole at least partially exposing the electrode pattern;
a light emitting layer disposed on the pixel defining layer; and a common electrode disposed on the light emitting layer, wherein the hole does not overlap the first contact hole and the second contact hole in a thickness direction of the display device.

2 . The display device of claim 1 , wherein the electrode pattern comprises:
a first expanded portion having a first width; and a protruding portion protruding from a side of the first expanded portion and having a width smaller than the first width.

3 . The display device of claim 2 , wherein the first width of the first expanded portion of the electrode pattern is greater than a second width of the hole.

4 . The display device of claim 3 , wherein the second width of the hole is greater than a third width of the second contact hole.

5 . The display device of claim 4 , wherein the third width of the second contact hole is different from a fourth width of the first contact hole.

6 . The display device of claim 2 , wherein the hole overlaps the first expanded portion of the electrode pattern in the thickness direction of the display device.

7 . The display device of claim 6 , wherein the second contact hole overlaps the protruding portion of the electrode pattern in the thickness direction of the display device.

8 . The display device of claim 7 , wherein the electrode pattern does not overlap the first contact hole in the thickness direction of the display device.

9 . The display device of claim 2 , wherein the voltage wiring comprises:
a second expanded portion overlapping the first expanded portion in the thickness direction of the display device; and a first extension portion extending from a side of the second expanded portion, wherein the second contact hole overlaps the first extension portion of the voltage wiring in the thickness direction of the display device.

10 . The display device of claim 1 , wherein the electrode pattern comprises:
a first electrode pattern having at least a portion thereof exposed by the hole; and a second electrode pattern not exposed by the hole, wherein the common electrode contacts the first electrode pattern and does not contact the second electrode pattern.

11 . The display device of claim 10 , wherein the light emitting layer is disposed between the common electrode and the pixel electrode exposed by the opening and is not disposed on the first electrode pattern exposed by the hole.

12 . The display device of claim 10 , wherein the voltage wiring comprises:
a first voltage wiring connected to the first electrode pattern; and a second voltage wiring connected to the second electrode pattern.

13 . The display device of claim 1 , wherein the data conductive layer comprises:
a first data conductive layer; and a second data conductive layer disposed on the first data conductive layer, wherein the protective layer comprises:
a first protective layer disposed between the first data conductive layer and the second data conductive layer; and
a second protective layer disposed between the second data conductive layer and the planarization layer.

14 . The display device of claim 13 , wherein the second data conductive layer is connected to the first data conductive layer through a third contact hole penetrating the first protective layer.

15 . The display device of claim 14 , wherein the third contact hole does not overlap the second contact hole in the thickness direction of the display device.

16 . The display device of claim 14 , wherein the pixel electrode contacts the source electrode of the second data conductive layer through the first contact hole, and
the electrode pattern contacts the voltage wiring of the second conductive layer through the second contact hole.

17 . The display device of claim 16 , further comprising:
a first electrode pad disposed on the second protective layer and the second data conductive layer, the first electrode pad contacting the source electrode of the second data conductive layer; and a second electrode pad disposed on the second protective layer and the second data conductive layer, the second electrode pad contacting the voltage wiring of the second data conductive layer, wherein the pixel electrode contacts the first electrode pad, and the electrode pattern contacts the second electrode pad.

18 . A display device comprising:
a plurality of pixels, each of which includes an opening area; a voltage wiring disposed in the opening areas of the pixels, the voltage wiring comprising:
a first expanded portion; and
a first extension portion extending from a side of the first expanded portion;
an electrode pattern disposed in the opening areas of the pixels, the electrode pattern comprising:
a second expanded portion overlapping the first expanded portion in a thickness direction of the display device; and
a protruding portion protruding from a side of the second expanded portion;
a pixel defining layer disposed on the second expanded portion of the electrode pattern, the pixel defining layer comprising a hole exposing at least a portion of the second expanded portion; and a common electrode disposed on the pixel defining layer, the common electrode contacting the exposed second expanded portion of the electrode pattern, wherein the voltage wiring and the electrode pattern are connected to each other through a contact hole, and the contact hole and the hole do not overlap each other in the thickness direction of the display device.

19 . The display device of claim 18 , wherein a width of the hole is smaller than a width of the second expanded portion of the electrode pattern and greater than a width of the contact hole.

20 . The display device of claim 19 , wherein the contact hole overlaps the protruding portion of the electrode pattern and the first extension portion of the voltage wiring, and
the protruding portion of the electrode pattern is connected to the first extension portion of the voltage wiring.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jun Hyun
• Kim Dong Woo
• Jo Kang Moon
• Moon Sung Jae

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/123 Primary

  Connection of the pixel electrodes to the thin film transistors [TFT] · CPC title

• H10K2102/351

  Thickness · CPC title